小样本机械产品加速寿命试验可信性数值研究
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- 英文论文题名：Numerical study of creditability of small sample accelerated life testing
- 论文作者：江超 ; 苏荔
- 英文论文作者：JIANG Chao ; SU Li ; Research Institute of Physical and Chemical Engineer of Nuclear Industry
- 年：2015
- 作者机构：核工业理化工程研究院;
- 论文关键词：加速寿命试验 ; 对数正态分布 ; 威布尔分布 ; 小样本
- 英文论文关键词：accelerated life testing ; logarithmic normal distribution ; Weibull distribution ; small sample
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第4册（同位素分离分卷）
- 语种：中文
- 分类号：TH114
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：472k
- 原文格式：O
- 会议级别：全国
摘要
在开展机械产品加速寿命试验过程中,由于试验周期、成本等原因的限制,参与试验的样本规模往往较小,而且同电子产品相比,机械产品个体间寿命差异较大,那么样本量对机械产品加速寿命试验数据评估的影响不得而知。本文基于给定的某机械产品寿命参数信息,利用MATLAB软件再生成不同规模的样本,形成加速寿命试验的模拟数据库。从该数据库中提取数据作为研究对象,在不同样本规模下,对加速寿命试验设置了混淆寿命分布以及追加样本等情形,最后比较了寿命评估的结果。结果表明:对数正态分布的数据看作威布尔分布时,同样本下评估结果差异较小;不同的样本设置情形对试验结果影响显著;样本的追加方式对评估精度有明显影响。
During the accelerated life testing of mechanical product,because of test cycles and cost,the sample size is often small,and comparing with electronic products,there are greater differences among the life of mechanical products,and what effcet the sample size has on the data evaluation of accelerated life testing is unknown.Based on a certain product parameter information,this paper uses MATLAB software to generate different sizes of samples,then the simulation database of accelerated life testing is created.As the research object in the database,the data is extracted as testing data from it.Under different sample sizes,the conditions of confusing life distribution and appending samples are setted for accelerated life testing,at last the results of life assessments are compared.The results show that there is small difference under the same sample when logarithmic normal distribution is regarded to Weibull distribution;samples of different settings have obvious influence on testing results;the different ways of sample complementing also have obvious influence on appraisal precision.
During the accelerated life testing of mechanical product,because of test cycles and cost,the sample size is often small,and comparing with electronic products,there are greater differences among the life of mechanical products,and what effcet the sample size has on the data evaluation of accelerated life testing is unknown.Based on a certain product parameter information,this paper uses MATLAB software to generate different sizes of samples,then the simulation database of accelerated life testing is created.As the research object in the database,the data is extracted as testing data from it.Under different sample sizes,the conditions of confusing life distribution and appending samples are setted for accelerated life testing,at last the results of life assessments are compared.The results show that there is small difference under the same sample when logarithmic normal distribution is regarded to Weibull distribution;samples of different settings have obvious influence on testing results;the different ways of sample complementing also have obvious influence on appraisal precision.
引文
[1]江超,赵凯.基于对数正态分布的机械产品步进应力加速寿命试验优化设计.2010.05.
[2]寇益强,赵凯,江超.一种机械产品的步进应力加速寿命试验总结报告.2011.12.
[2]寇益强,赵凯,江超.一种机械产品的步进应力加速寿命试验总结报告.2011.12.